<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" type="text/css" href="css/index.css">
</head>

<body>
    <div id="app">
        <div class="grid">
            <div>
                <h1>图书管理</h1>
                <div class="book">
                    <div>
                        <label for="id">
              编号：
            </label>
                        <input type="text" id="id" v-model='id' disabled="false" v-focus>
                        <label for="name">
              名称：
            </label>
                        <input type="text" id="name" v-model='name'>
                        <button @click='handle' :disabled="submitFlag">提交</button>
                    </div>
                </div>
            </div>
            <div class="total">
                <span>图书总数：</span>
                <span>{{total}}</span>
            </div>
            <table>
                <thead>
                    <tr>
                        <th>编号</th>
                        <th>名称</th>
                        <th>时间</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <tr :key='item.id' v-for='item in books'>
                        <td>{{item.id}}</td>
                        <td>{{item.name}}</td>
                        <td>{{item.date | format('yyyy-MM-dd hh:mm:ss')}}</td>
                        <td>
                            <a href="" @click.prevent='toEdit(item.id)'>修改</a>
                            <span>|</span>
                            <a href="" @click.prevent='deleteBook(item.id)'>删除</a>
                        </td>
                    </tr>
                </tbody>
            </table>
        </div>
    </div>
    <script type="text/javascript" src="js/vue.js"></script>
    <script type="text/javascript" src="js/axios.js"></script>
    <script type="text/javascript">
        // 图书管理-添加图书

        axios.defaults.baseURL = 'http://localhost:3000/';
        axios.interceptors.response.use(function(res) {
            return res.data;
        }, function(error) {
            console.log(error)
        });
        Vue.directive('focus', {
            inserted: function(el) {
                el.focus();
            }
        });
        Vue.filter('format', function(value, arg) {
            function dateFormat(date, format) {
                if (typeof date === "string") {
                    var mts = date.match(/(\/Date\((\d+)\)\/)/);
                    if (mts && mts.length >= 3) {
                        date = parseInt(mts[2]);
                    }
                }
                date = new Date(date);
                if (!date || date.toUTCString() == "Invalid Date") {
                    return "";
                }
                var map = {
                    "M": date.getMonth() + 1, //月份 
                    "d": date.getDate(), //日 
                    "h": date.getHours(), //小时 
                    "m": date.getMinutes(), //分 
                    "s": date.getSeconds(), //秒 
                    "q": Math.floor((date.getMonth() + 3) / 3), //季度 
                    "S": date.getMilliseconds() //毫秒 
                };
                format = format.replace(/([yMdhmsqS])+/g, function(all, t) {
                    var v = map[t];
                    if (v !== undefined) {
                        if (all.length > 1) {
                            v = '0' + v;
                            v = v.substr(v.length - 2);
                        }
                        return v;
                    } else if (t === 'y') {
                        return (date.getFullYear() + '').substr(4 - all.length);
                    }
                    return all;
                });
                return format;
            }
            return dateFormat(value, arg);
        })
        var vm = new Vue({
            el: '#app',
            data: {
                flag: false,
                submitFlag: false,
                id: '',
                name: '',
                books: []
            },
            methods: {
                handle: async function() {
                    if (this.flag) {
                        // 编辑图书
                        var ret = await axios.put('books/' + this.id, {
                            name: this.name
                        });
                        if (ret.status == 200) {
                            // 重新加载列表数据
                            this.queryData();
                        }
                        this.flag = false;
                    } else {
                        // 添加图书
                        var ret = await axios.post('books', {
                            name: this.name
                        })
                        if (ret.status == 200) {
                            // 重新加载列表数据
                            this.queryData();
                        }
                    }
                    // 清空表单
                    this.id = '';
                    this.name = '';
                },
                toEdit: async function(id) {
                    // flag状态位用于区分编辑和添加操作
                    this.flag = true;
                    // 根据id查询出对应的图书信息
                    var ret = await axios.get('books/' + id);
                    this.id = ret.id;
                    this.name = ret.name;
                },
                deleteBook: async function(id) {
                    // 删除图书
                    var ret = await axios.delete('books/' + id);
                    if (ret.status == 200) {
                        // 重新加载列表数据
                        this.queryData();
                    }
                },
                queryData: async function() {
                    // 调用后台接口获取图书列表数据
                    // var ret = await axios.get('books');
                    // this.books = ret.data;

                    this.books = await axios.get('books');
                }
            },
            computed: {
                total: function() {
                    // 计算图书的总数
                    return this.books.length;
                }
            },
            watch: {
                name: async function(val) {
                    // 验证图书名称是否已经存在
                    // var flag = this.books.some(function(item){
                    //   return item.name == val;
                    // });
                    var ret = await axios.get('/books/book/' + this.name);
                    if (ret.status == 1) {
                        // 图书名称存在
                        this.submitFlag = true;
                    } else {
                        // 图书名称不存在
                        this.submitFlag = false;
                    }
                }
            },
            mounted: function() {
                // var that = this;
                // axios.get('books').then(function(data){
                //   console.log(data.data)
                //   that.books = data.data;
                // })

                // axios.get('books').then((data)=>{
                //   console.log(data.data)
                //   this.books = data.data;
                // })

                this.queryData();
            }
        });
    </script>
</body>

</html>